Here be dragons.

Hordes of precariously balanced stone figures crowd the shores of the Hudson River.

Known as the "Forgotten City" it was home to industry, riots, artists, squatters, and to one of the largest single disaster fires in New York City.

If it hadn't been caught in time, a flaw in the design of this Manhattan skyscraper could have led to its collapse.

This giant boulder is sandwiched between apartment complexes in upper Manhattan.

Historic Greenpoint theater turned roller disco, then chain pharmacy, and now Sweetgreen.

The highest point on the island known for buildings that touch the sky.

The only surviving sidewalk clock in Brooklyn.

Church featuring "high Victorian gothic" architecture.

One of the only single-person private gravesites in New York City.

Site of the first pathological and bacteriological research facility in the United States.

This outdoor gallery of sculptures along the East River was once a landfill.

A mysterious statue of a leather jacket-clad rebel leans coolly on an odd yellow clock.

The mosaic Star of David at the front of this store hints that it's no ordinary Italian grocer.

Hidden inside one of the world's most well-visited zoos is a secret plaque promising eternal life.

A monument marks the spot where the first Catholic missionaries arrived in Uganda.

This small roadside eatery exists in both the Northern and Southern hemispheres, as the equator runs right through it.

This 19th-century Hamptons windmill was once home to modernist painter Agnes Pelton.

The abandoned grounds and derelict greenhouses of this once-magnificent Edwardian estate are now a nature preserve open for exploration.

A mysterious air force base built to resemble a Long Island fishing village.

An architecturally unique lighthouse that had to be lifted up and moved to avoid falling in the sea.

The oldest military monument in the United States.

This urban park is home to monkeys and a number of endangered plants.

This tranquil park with a spiral viewing tower is an off-the-beaten-path area where renowned people have planted a small grove of trees.